From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 949802DFA5E; Tue, 29 Apr 2025 23:53:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745970829; cv=none; b=Y7XTrzOIWZl5N4nKwprFtRQiP2/QN4wShuDrR4CliTZROhh0aEv1ng6rxIPzY/7aHCxQngTQu2rIJlj9b3oR5luqFM5AdNTt44JtVXCumwvmC6EUR0smZzpuJDmx70HgwUVGMiiT15gNnvnKoKKDQ8y+4iGOx8OZUzaORcLOuXg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745970829; c=relaxed/simple; bh=L1DXBN/ZIWGkfyY4/8zCa24buJIdqykH1WWhCW9C04c=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=QpIMzG5QnY2wPT7YPeyh0+uNhuEGvIwxo23qQekSCtgm6y19TqwvnEIhjFRpRC5i2u3E+gkt5dXhGU3cBP2+MCHEKoKdLtCCNbwSkPSEFEYQsyDBrECTL+Mryz6yzimHaCFjl6+qg0vjqhpzT8tPPIsE8BzFYSwb7SJswJPCqhA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=eUA83+6F; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="eUA83+6F" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 81EF2C4CEEE; Tue, 29 Apr 2025 23:53:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1745970829; bh=L1DXBN/ZIWGkfyY4/8zCa24buJIdqykH1WWhCW9C04c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eUA83+6Fw3ViOnNnoaIP9MG4f2IV2Jl7SCkaFmDLT/yu9voLCSlp5O3ijGqah02C4 ipZtLjufhy0SVOgmdvdQlMmBW0AEltNLz0gNMiJdQUs3C4SzGus5XKyqF4H/DnshHI wKACNVWRu0871+OvwXxi8jhRyLzmKSnXO2njdeuiDBgt/LNZUf+mSmuJCqGxew9g6n gtHWeTHFbW77zZLiZbphgafoERaMM3eyUHvZC6O78xRqxF2kUBmZVQ7F/g2Z2QHSR+ ftsUHg+ygtIVJwf/cjr0U64t0VRdbAt3BKsfkQEGGtsgSW0gihQl8tZrq6fh/bRI6F Ew2TFDDVMQY0g== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: gaoxu , =?UTF-8?q?Michal=20Koutn=C3=BD?= , Tejun Heo , Sasha Levin , hannes@cmpxchg.org, cgroups@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 4/7] cgroup: Fix compilation issue due to cgroup_mutex not being exported Date: Tue, 29 Apr 2025 19:53:35 -0400 Message-Id: <20250429235339.538269-4-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250429235339.538269-1-sashal@kernel.org> References: <20250429235339.538269-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.180 Content-Transfer-Encoding: 8bit From: gaoxu [ Upstream commit 87c259a7a359e73e6c52c68fcbec79988999b4e6 ] When adding folio_memcg function call in the zram module for Android16-6.12, the following error occurs during compilation: ERROR: modpost: "cgroup_mutex" [../soc-repo/zram.ko] undefined! This error is caused by the indirect call to lockdep_is_held(&cgroup_mutex) within folio_memcg. The export setting for cgroup_mutex is controlled by the CONFIG_PROVE_RCU macro. If CONFIG_LOCKDEP is enabled while CONFIG_PROVE_RCU is not, this compilation error will occur. To resolve this issue, add a parallel macro CONFIG_LOCKDEP control to ensure cgroup_mutex is properly exported when needed. Signed-off-by: gao xu Acked-by: Michal Koutný Signed-off-by: Tejun Heo Signed-off-by: Sasha Levin --- kernel/cgroup/cgroup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 1e87257fe4692..1a3b2e1436db0 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -89,7 +89,7 @@ DEFINE_MUTEX(cgroup_mutex); DEFINE_SPINLOCK(css_set_lock); -#ifdef CONFIG_PROVE_RCU +#if (defined CONFIG_PROVE_RCU || defined CONFIG_LOCKDEP) EXPORT_SYMBOL_GPL(cgroup_mutex); EXPORT_SYMBOL_GPL(css_set_lock); #endif -- 2.39.5